// 
//  Copyright 2011  reda
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
using System;
using ManiacMusicManager.Data.Core;
using NHibernate;
using ManiacMusicManager.Data.DAO.Ifaces;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
namespace ManiacMusicManager.Data.DAO
{
	public class MusicFileDAO : AbstractDAO<MusicFile>, IMusicFileDAO
	{
		public MusicFileDAO (ISession session)
			: base(session)
		{
		}
	

		#region IMusicFileDAO implementation
		public IEnumerable<MusicFile> SelectByPathPattern (string pattern)
		{
			var specialChars = new char[] {'(', ')', '{', '}', '[', ']', '\\', ',', '.', '^', '$', '?', '+', '|'};
			var strRegex = pattern;
			foreach(var ch in specialChars)
				strRegex = strRegex.Replace(ch.ToString(), "\\" + ch);
			strRegex = strRegex.Replace("*", ".*");
			var regex = new Regex(strRegex);
			var parties = pattern.Split('*');
			
			var preFilte = (from f in this.Linq()
			                where parties.All(x => f.FileName.Contains(x))
			                select f);
			foreach(MusicFile f in preFilte) {
				if(regex.IsMatch(f.FileName))
					yield return f;
			}
		}
		#endregion
	}
}

